feat(at): add computer.aesthetic.paper lexicon + backfill 22 papers
- New lexicon schema for papers.aesthetic.computer papers
- Published to ATProto network as 7th custom lexicon
- Backfill script creates records under @jeffrey's PDS account
- All 22 papers synced with title, slug, pdfUrl, languages, revisions
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>